WO2018223854A1 - Station de base, unité distante à radiofréquences et carte mère, carte fille à radiofréquences et procédé d'établissement automatique de canal associé - Google Patents

Station de base, unité distante à radiofréquences et carte mère, carte fille à radiofréquences et procédé d'établissement automatique de canal associé Download PDF

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Publication number
WO2018223854A1
WO2018223854A1 PCT/CN2018/088474 CN2018088474W WO2018223854A1 WO 2018223854 A1 WO2018223854 A1 WO 2018223854A1 CN 2018088474 W CN2018088474 W CN 2018088474W WO 2018223854 A1 WO2018223854 A1 WO 2018223854A1
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Prior art keywords
radio
card
remote unit
intermediate frequency
radio frequency
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PCT/CN2018/088474
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English (en)
Chinese (zh)
Inventor
刘兴旺
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中兴通讯股份有限公司
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Priority to JP2019562561A priority Critical patent/JP6821115B2/ja
Publication of WO2018223854A1 publication Critical patent/WO2018223854A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a base station, a radio remote unit, a main board, a radio frequency subcard, and a channel self-building method.
  • the base station is an indispensable component of the wireless communication network.
  • the base station is generally composed of a Baseband Processing Unit (BBU) and a Radio Remote Unit (RRU).
  • BBU Baseband Processing Unit
  • RRU Radio Remote Unit
  • a relatively fixed feature is that the RF devices such as power amplifiers on each RF channel are integrated on the single board, and the intermediate frequency processing devices corresponding to all the RF devices are also solidified. Therefore, once the single board is formed, the radio frequency capability and the intermediate frequency capability of the radio remote unit are all cured. Therefore, once the board is processed and formed, the capability of the radio remote unit is fixed, and the RF channel fails or the RF channel capability is insufficient, and the entire board cannot be replaced, resulting in high use cost.
  • the embodiments of the present invention provide a base station, a radio remote unit, and a main board, a radio frequency subcard, and a channel self-construction method, which at least partially solve the problem that the device fixing on the radio remote unit causes the capability to be fixed and the use cost is high.
  • the processor is configured to select a radio frequency subcard to be used according to the currently connected radio frequency subcard and the current service configuration information in the card slot, and select a corresponding intermediate frequency processing device from the intermediate frequency resource pool to implement The IF channel corresponding to the RF channel implemented by the selected RF daughter card.
  • the embodiment of the present invention further provides a radio frequency remote unit including a radio frequency subcard according to the present invention and a radio remote unit in accordance with the present invention, wherein the radio frequency subcard and the card slot on the main board of the radio remote unit are detachable Ground connection, the daughter card interface is electrically connected to the motherboard interface.
  • the embodiment of the invention further provides a base station, comprising a baseband processing unit and a radio remote unit according to the invention.
  • the radio remote unit is coupled to the baseband processing unit.
  • the processor of the remote unit of the remote radio unit is configured to: acquire capability information of a currently connected radio frequency subcard in a card slot on a board of the remote unit of the radio remote unit, and feed back the capability information to the baseband a processing unit; and selecting, according to the service configuration information sent by the baseband processing unit, a radio frequency subcard to be used from a radio frequency subcard currently connected in a card slot on a board of the radio remote unit
  • the intermediate frequency processing device of the main board of the radio remote unit is selected to implement an intermediate frequency channel corresponding to the radio frequency channel implemented by the selected radio daughter card.
  • the baseband processing unit is configured to transmit service configuration information to the processor based on the capability information fed back from the processor.
  • the embodiment of the invention further provides a method for self-construction of a remote radio unit channel, comprising: acquiring capability information of a currently connected radio frequency sub-card in a card slot on a board of the remote-radiation unit main board, and The information is fed back to the baseband processing unit; the service configuration information sent by the baseband processing unit based on the capability information is received; and the service configuration information is currently connected from the card slot on the board of the motherboard of the radio remote unit Selecting a radio frequency daughter card to be used in the radio frequency daughter card, and selecting a corresponding intermediate frequency processing device from the intermediate frequency resource pool of the radio remote unit to implement an intermediate frequency corresponding to the radio frequency channel implemented by the selected radio daughter card aisle.
  • An embodiment of the present invention further provides a computer readable storage medium having stored thereon a computer program, which when executed by a processor, causes the processor to perform a radio remote unit channel self-building method according to the present invention.
  • FIG. 4 is a schematic structural diagram of a main board of a radio remote unit according to an embodiment of the invention.
  • FIG. 5 is a schematic structural diagram of an intermediate frequency resource pool according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a radio remote unit according to an embodiment of the present invention.
  • FIG. 8 is a schematic flow chart of a method for self-establishing a channel of a radio remote unit according to an embodiment of the present invention
  • FIG. 9 is a schematic flowchart of a method for establishing a channel of a base station according to an embodiment of the present invention.
  • the radio remote unit comprises a radio frequency subcard and a radio remote unit.
  • the radio frequency device on the radio frequency sub-card realizes one radio frequency channel
  • the intermediate frequency resource pool on the main board of the radio remote unit is provided with a plurality of intermediate frequency processing devices that realize the intermediate frequency channel by combination.
  • the radio frequency sub-card and the radio remote unit can be detachably connected through the card slot.
  • the processor on the main board of the radio remote unit can select the radio frequency to be used according to the currently connected radio sub-card in the card slot and the current service configuration information.
  • the subcard, and selecting the corresponding intermediate frequency processing device from the intermediate frequency resource pool implements an intermediate frequency channel corresponding to the radio frequency channel implemented by the radio daughter card.
  • the radio frequency sub-card for implementing the radio frequency channel can be detached from the main board of the radio remote unit, and the IF resources on the main board of the radio remote unit can be flexibly combined according to specific service and radio sub-card requirements.
  • the RF capability and IF capability of the RF remote unit are flexible and can be adapted to a variety of application needs.
  • the radio frequency sub-card and the radio remote unit main board (also referred to as a single board) according to the present invention are exemplified below.
  • FIG. 1 is a schematic structural diagram of a radio frequency daughter card according to various embodiments of the present invention
  • FIG. 4 is a schematic structural diagram of a radio frequency remote unit main board according to an embodiment of the invention.
  • the radio frequency sub-card includes a card body 11, a radio frequency device 13 disposed on the card body 11, and a sub-card interface 12.
  • the radio frequency device 13 on a card body 11 is used to implement a radio frequency channel (i.e., a radio frequency link).
  • the daughter card interface 12 of the radio frequency daughter card may be disposed at one end of the card body 11 that is engaged in the card slot 25.
  • the card body 11 can be detachably connected to the radio frequency remote unit main board by inserting or snapping into the card slot 25.
  • the detachable connection can also be performed by other means.
  • the motherboard interface 24 on the motherboard of the radio remote unit can be directly disposed in the card slot 25. In order to ensure the reliability and convenience of the contact, the motherboard interface 24 can be directly disposed at the bottom of the card slot 25.
  • the daughter card interface 12 and the motherboard interface 24 may also be disposed in areas outside the card slot 25 and may be connected to each other by wiring.
  • the radio frequency device 13 on the radio frequency sub-card can implement the radio frequency channel (ie, transmit the radio frequency link), and can also receive the radio frequency channel (ie, receive the radio frequency link), and different radio sub-cards can be implemented.
  • the RF channels of different frequency bands can also realize the RF channels of the same frequency band, so that they can be flexibly set according to specific needs.
  • the radio frequency device 13 disposed on the card body 11 of the radio frequency sub-card may include an amplifier 131, a filter 132, and an antenna 133 which are sequentially connected, and the amplifier 131 is electrically connected to the sub-card interface 12.
  • the amplifier 131 can employ the low noise amplifier 131.
  • the types of the amplifier 131, the filter 132, and the antenna 133, as well as the specific functional parameters, etc. can be flexibly set according to specific application scenarios.
  • the daughter card interface 12 of the radio daughter card can be implemented by a gold finger.
  • the radio frequency device 13 may include devices other than the illustrated amplifier 131, filter 132, and antenna 133, and may be flexibly set according to actual needs.
  • the radio frequency device 13 is card-carded, and the radio-frequency device 13 link is split into functional independent sub-cards according to the radio channel characteristics.
  • a corresponding card slot 25 is reserved on the main board of the radio remote unit.
  • the radio frequency daughter card is hard-linked through the card slot 25 and the remote control unit of the radio frequency remote unit, and the motherboard of the radio remote unit can obtain the number of connected radio frequency sub-cards through the motherboard interface 24 circuit in the card slot 25, and the radio frequency sub-cards. Capability information, etc., in turn, can select and establish RF links and IF links.
  • the radio remote unit motherboard is exemplified below with reference to FIG.
  • the main board of the radio remote unit includes a board body 21, a processor 23 disposed on the board body 21, an intermediate frequency resource pool 22, a card slot 25, and a motherboard interface 24.
  • the intermediate frequency resource pool 22 includes a plurality of intermediate frequency processing devices that implement an intermediate frequency channel by combining. That is, according to the embodiment of the present invention, the connection relationship of the intermediate frequency processing device in the intermediate frequency resource pool 22 and the assigned radio frequency channel are not limited, but the required intermediate frequency processing device can be flexibly selected and logically combined according to actual needs. To achieve an IF channel (ie, an IF link).
  • the main board interface 24 is electrically connected to the intermediate frequency processing device in the intermediate frequency resource pool 22, and the card slot 25 is used for the card body 11 of the radio frequency subcard to be connected to the subcard of the radio frequency subcard body 11.
  • the interface 12 is electrically connected to the motherboard interface 24.
  • the processor 23 can select the radio frequency sub-card to be used according to the currently connected radio sub-card in the card slot 25 on the main board of the radio remote unit, and the current service configuration information, and select the corresponding intermediate frequency processing device from the intermediate frequency resource pool 22.
  • the IF channel corresponding to the RF channel implemented by the selected RF daughter card is implemented, thereby realizing the self-construction of the RF channel and the IF channel.
  • Table 5 shows the frequency information table as follows:
  • the processor 23 on the main board of the radio remote unit can generate new routing information according to the changed service configuration information.
  • the underlying digital IF subsystem dynamically adjusts the IF subsystem functional units that have been previously built on the physical channel according to the new routing information, and the new affiliation of the basic unit in the unbuilt IF resource pool 22 and its topology connection relationship.
  • Complete the construction of the IF link after the business change is completed.
  • the construction of the IF basic functional unit can preferentially meet the radio frequency capability, and secondly, it satisfies the principle of simple topology connection.
  • the principle selection algorithm can be designed by software.
  • the processor 23 on the main board of the radio remote unit can also dynamically monitor the in-position state and the fault state of the radio frequency sub-card on the board slot 25 of the radio remote unit.
  • the processor 23 analyzes whether there are other idle radio daughter card units. as a backup. If there is an alternate radio daughter card resource, a new IF route is generated, and the IF link corresponding to the missing or damaged radio daughter card is reconstructed by using the spare RF daughter card.
  • the device will send an alarm warning to the device to implement self-built hot replacement after the radio daughter card of the radio remote unit is abnormal.
  • the processor 23 may re-collect the statistical radio frequency capability information and report the message to the baseband processing unit to implement the radio remote unit. The thermal expansion of capabilities is better suited to a variety of application scenarios.
  • the channel self-establishment method of the radio remote unit may include steps S801 to S803.
  • S803 Select a radio frequency subcard to be used from the radio frequency subcard currently connected in the card slot 25 on the board 21 according to the service configuration information, and select a corresponding intermediate frequency processing device from the intermediate frequency resource pool 22 to implement and select.
  • the radio remote unit according to the capability of the radio link on the link (including, for example, the radio remote unit frequency band capability, the radio remote unit channel capability, and the radio remote unit carrier combination capability)
  • the mapping between the frequency band, the channel and the frequency band supported by the radio remote unit, and the bandwidth configuration of the carrier that can be supported on the channel are reported to the baseband resource pool in the form of inter-board messages.
  • the baseband resource pool sends the cell information and frequency point information configured in the background within the capability range to the radio remote unit according to the capability information reported by the radio remote unit.
  • the radio remote unit analyzes the antenna group information and the carrier number information in the cell information sent in the baseband resource pool, and the center frequency point information and the carrier bandwidth information in the frequency point message, according to the simplest constraint mode of the topology connection, and dynamically Information (ie, routing information) is generated to determine the topological connection relationship of various basic units in the digital resource pool.
  • dynamically Information ie, routing information
  • routing information is generated to determine the topological connection relationship of various basic units in the digital resource pool.
  • routing information ie, routing information
  • the constraint algorithm herein can be described as follows: under the constraint of simple topology connection, the number of each basic unit in the intermediate frequency resource pool 22 selectively connected to the specific radio frequency link must be the closest resource number; Under the constraint condition, in the newly added routing information, the relevant IF resources must be in the unused state before the construction; under the constraint of the overall migration, the IF resources in the IF resource pool 22 have the same topological relationship and are mandatory. Connect to the specified RF resource.
  • Table 6 shows an example of the filling of the band capability table (Table 1):
  • Table 8 shows an example of the filling of the RF channel capability table (Table 2) for Channel 1:
  • the service configuration at the initial power-on and the self-establishment process of the RF channel and the IF channel can be completed.
  • the radio remote unit sends the actual cell information and the antenna group, the number of carriers, the center frequency, and the carrier in the frequency point information according to the baseband processing unit.
  • the routing information that satisfies the simplest constraint of the topology connection is analyzed.
  • the antenna group field information is 1, the carrier number field information is 1, and the center frequency point is 18805 (unit 100kz), the carrier bandwidth is 20M (in bps), then it can be mapped to the carrier 0 and channel 1 on the radio remote unit to establish a carrier with a bandwidth of 10M and a frequency of 18805 (100KZ).
  • such routing information can be known, for example, in the intermediate frequency resource pool 22, the difference filter numbered 1 in the interpolation filter resource pool is selectively connected to the number in the numerical control oscillator resource pool.
  • the established channel may be dynamically adjusted according to the change of the service configuration, the in-position state of the radio daughter card, and the running state of the radio daughter card.
  • the processor 23 is further configured to: when the service configuration information change needs to update the intermediate frequency processing device, re-determine the connection relationship between the required intermediate frequency processing device and each intermediate frequency processing device according to the changed service configuration. And re-corresponding to the configuration interconnection selection register to connect the IF processing devices to implement an intermediate frequency channel; of course, when the service configuration information needs to be updated to the intermediate frequency processing device, it is determined that the current RF channel and the intermediate frequency channel can also satisfy the service. When you need it, you can make no changes.
  • the radio remote unit re-analyzes the antenna group information, the frequency point information, the number of carriers, the carrier bandwidth, and the function modules in the current IF resource pool 22 in the cell information delivered by the background. Idle, generate new IF routing information, convert to the true value of the routing information, and complete the re-construction of the basic unit topology in the logical resource pool of the IF subsystem by performing the underlying IF subsystem to achieve the re-dynamic adjustment of the device link. For example, based on the above example, one more 10M carrier is added to each channel.
  • a new topology can be generated that satisfies the unchanged link, and the newly generated topology connection is the simplest constraint.
  • the routing information that is, the difference filter of number 1 in the interpolation filter resource pool in the intermediate frequency resource pool 22 is selectively connected to the numerically controlled oscillator functional unit numbered 1 in the numerically controlled oscillator resource pool, thereby selectively connecting the peak clipping
  • the peaking function unit numbered 1 in the resource pool which in turn selectively connects the digital predistortion processor functional unit numbered 1 in the digital predistortion processor resource pool, and then selectively connects the RF resources of channel 0,
  • the first 10M carrier of channel 0 is processed; the difference filter numbered 3 in the interpolation filter resource pool is selectively connected to the numerically controlled oscillator functional unit numbered 3, and the number is selectively connected to the peak clipping resource pool.
  • the peaking function unit numbered 2 in the peak clipping resource pool thereby selectively connecting the digital predistortion processor functional unit numbered 2 in the digital predistortion processor resource pool, and then selectively connecting
  • the radio frequency resource of channel 1 is used to process the first 10M carrier of channel 1;
  • the difference filter numbered 4 in the interpolation filter resource pool is selectively connected to the numerically controlled oscillator functional unit numbered 4, and then selectively connected and cut.
  • the peaking function unit numbered 4 in the peak resource pool which in turn selectively connects the digital predistortion processor functional unit numbered 4 in the digital predistortion processor resource pool, and then selectively connects the radio frequency resources of channel 1. Used to process the 2nd 10M carrier of channel 1.
  • the true value corresponding to this route is then set to the underlying FPGA through the routing configuration register interface.
  • the FPGA dynamically adjusts the new attribution of the basic unit in the intermediate frequency resource pool 22 and its topology connection relationship in order to complete the construction of the intermediate frequency link that satisfies the service change.
  • the processor 23 is further configured to monitor whether there is a failure of the RF daughter card on the card slot 25 and/or the RF device 13 on the RF daughter card during operation of the RF daughter card. If a detachment or failure occurs, it is determined whether an idle radio daughter card is connected to the card slot 25 of the board body 21. If there is an idle radio daughter card, one of the idle radio daughter cards is selected, and the required intermediate frequency processing device and the connection relationship between the intermediate frequency processing devices are determined for the selected idle radio daughter card, and the interconnection selection is correspondingly configured. Registers to connect the IF processing devices to implement the IF channel.
  • the monitoring software of the processor 23 on the main board dynamically monitors the state of the radio frequency link during operation of the radio frequency device.
  • the processor 23 can be used as a backup by analyzing whether there are other idle radio links. If there is a spare RF link, a new IF route is regenerated, and the IF link corresponding to the damaged RF link is reconstructed using the alternate RF link. If there is no radio channel resource that can be used as a backup, the system reports an abnormal alarm.
  • an abnormality occurs in the radio link of channel 0, and the corresponding routing information is "the difference filter of the interpolation filter resource pool is selectively connected to the numerically controlled oscillator numbered 1 in the numerical control oscillator resource pool.
  • the functional unit which in turn selectively connects the peaking function unit numbered 1 in the peak clipping resource pool, and optionally connects the digital predistortion processor functional unit numbered 1 in the digital predistortion processor resource pool, and then Selectively connect the radio frequency resource of channel 0.
  • the IF routing information will be migrated to radio resource 1 as a whole. Therefore, the final routing information is changed into the “interpolation filter resource pool”.
  • the difference filter numbered 1 is selectively connected to the numerically controlled oscillator functional unit numbered 1 in the numerically controlled oscillator resource pool, and is optionally connected to the peaking function unit numbered 1 in the peak clipping resource pool, thereby selectively Connect the digital predistortion processor functional unit numbered 1 in the digital predistortion processor resource pool, and then selectively connect the RF resources of channel 1."
  • the routing information is not updated, and the related fault information is collected, and the channel abnormal alarm is reported to the baseband resource pool.
  • the IF basic unit resources on the main board can be shared by the respective RF channels, and the multiplex is greatly multiplexed. Idle resources are used to improve resource utilization; if a radio channel failure needs to be replaced (for example, a power amplifier unit failure) or the capacity is not sufficient during the use process, only the old RF daughter card needs to be unplugged and then plugged in.
  • the new RF daughter card can realize the hot replacement of the RF device without powering down the whole machine, which not only improves the flexibility of use, but also greatly reduces the use cost; the function of the remote unit and the baseband processing unit in the RF remote unit If you want to expand the capacity, you need to insert the newly added radio daughter card into the card slot. After the device is restarted, you can adapt the capacity and expand the capacity (the expansion mode is cold expansion).
  • the radio frequency capability can be extended without the radio remote unit being powered down, that is, the radio frequency capability of the radio remote unit is thermally expanded.
  • FIG. 9 is a schematic flowchart of a method for establishing a channel of a base station according to an embodiment of the present invention.
  • the embodiment of the present invention provides a base station, including a baseband processing unit and a radio remote unit according to the present invention.
  • the radio remote unit is connected to the baseband processing unit, and the interface specifically connected between the two may adopt various connection interfaces, for example, OPT interface.
  • the processor 23 of the remote radio unit obtains the capability information of the currently connected radio frequency subcard in the card slot 25 on the mainboard board body 21, and feeds back to the baseband processing unit, according to the service configuration information sent by the baseband processing unit, from the board 21
  • the radio frequency sub-cards to be used are selected from the currently connected radio frequency sub-cards in the card slot 25, and the corresponding intermediate frequency processing device is selected from the intermediate frequency resource pool 22 to implement the radio frequency channel corresponding to the selected radio sub-card. IF channel.
  • the baseband processing unit transmits the service configuration information to the processor 23 of the radio remote unit based on the capability information of the radio remote unit and the current service demand.
  • the base station may dynamically adjust the established channel according to the change of the service configuration, the in-position state of the radio daughter card, and the running state of the radio daughter card.
  • the channel self-establishment method of the base station shown in FIG. 9 includes steps S901 to S911.
  • the uplink and downlink paths of the radio remote unit are demarcated by AD/DA, and the link close to the antenna side is laid as a subcard (ie, a radio frequency subcard) in a channel unit, and the circuit board near the baseband side is disposed.
  • a subcard ie, a radio frequency subcard
  • N gold finger slots are reserved on the motherboard, and the motherboard and the daughter card can be physically and electrically connected through the gold finger slot.
  • the radio remote unit in the initial configuration phase of the service, the radio remote unit generates the frequency routing information by analyzing the service information, and is configured to the intermediate frequency subsystem through the routing configuration register interface to complete the dynamic construction of the intermediate frequency link and the intermediate frequency circuit and the radio daughter card. The connection and subsequent processing of the business signal.
  • the routing information is re-generated and configured according to the new service information, so as to complete the dynamic adjustment of the link resources.
  • the mainboard processor 23 periodically monitors the radio daughter card status to see if the subcard has failed or the number is reduced. If no fault occurs or the number decreases, then go to S907; otherwise, go to S909.
  • the topology connection of the basic unit of the resource pool can be adjusted in real time to complete the link self-adaptation of the radio remote unit during operation. Dynamically monitor the change of the daughter card of the remote radio unit, or dynamically reconstruct the topology link of the intermediate frequency basic unit in real time according to the change of the background configuration, so as to complete the dynamic adjustment of the uplink and downlink of the remote radio unit, so as to a certain extent Complete fault hot backup and RF capacity hot expansion.

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Abstract

La présente invention concerne une station de base, une unité distante à radiofréquences (RF), et une carte mère, une carte fille RF et un procédé d'établissement automatique de canal associé. L'unité distante RF comprend une carte fille RF et une carte mère d'unité distante RF. Un dispositif RF sur la carte fille RF établit un canal RF. Un groupe de ressources à fréquences intermédiaires (IF) sur la carte mère d'unité distante RF est pourvu de multiples dispositifs de traitement RF établissant un canal RF grâce à une combinaison. La carte fille RF et la carte mère d'unité distante RF peuvent être reliées de façon détachable par une fente de carte. Un processeur sur la carte mère d'unité distante RF peut sélectionner, selon une carte fille RF connectée actuellement dans la fente de carte et des informations de configuration de service actuelles, une carte fille RF qui doit être utilisée, et sélectionner un dispositif de traitement IF à partir du groupe de ressources IF pour établir un canal IF correspondant au canal RF établi par la carte fille RF.
PCT/CN2018/088474 2017-02-21 2018-05-25 Station de base, unité distante à radiofréquences et carte mère, carte fille à radiofréquences et procédé d'établissement automatique de canal associé WO2018223854A1 (fr)

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